Vacuum cleaner



FIG. 1 is a top, front and right side perspective view of a vacuum cleaner showing my new design;

FIG. 2 is a front elevational view thereof,

FIG. 3 is a rear elevational view thereof,

FIG. 4 is a top plan view thereof,

FIG. 5 is a right side elevation view, a left side elevation view being a mirror image thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a vacuum cleaner, as shown and described. 